Currently running Opencart 3.0.2.0.
The bottom of every account page says "Your shopping cart is empty!" Instead of the normal text associated with the page.
This is on the wishlist, order history, downloads, and every page that doesn't have any info.

I get the same you shopping cart is empty on every page in account tab for example if download not associated for order instead of saying you don't not have downloadable product it says in account/download that your shopping cart is empty.
Seems like a big?

how about trying on a clean installation, does the issue persists? You may need to hire someone to look into it, or perhaps try starting on a clean installation if you have yet to perform much customisation to the website

Same problem here Everywhere "Your shopping cart is empty!" example on category pages, where no products (it suposed to be written "There are no products to list in this category."). How did you solve that? v3.0.2.0.

It happened may due to the variable of the text_empty of header and category file have some conflict.
This is my solution:
please try to go the main folder\catalog\language\en-gb\product\category.php and edit the this content.
text_empty to text_category_empty

And go to the main folder\catalog\view\theme\default\template\product\category.twig and edit the this content.
text_empty to text_category_empty

Also seen like Daniel had fixed in the master version.

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